How to build
print all parts and 5 copies of the finger
Run a rubber band through the back of the finger with a loop around the post in the hand top.
use thread through finger joints (the wedge part)
glue the handle and the hand halves together.
There are 3 holes ,pointer, middle , and all others tie them to 3 rings (like a key ring)
I included an image of the thread and rubber cord I used.